Terylene, a polyester, is formed by the condensation of
Correct answer: B. a diol with a dicarboxylic acid
- A. two amino acids
- B. a diol with a dicarboxylic acid
- C. two molecules of ethene
- D. glucose units
Explanation
Ethane-1,2-diol reacts with benzene-1,4-dicarboxylic acid so that ester linkages form and water is eliminated, giving a polymer used for clothing fibre and drink bottles. A diamine with a diacid would give a polyamide such as nylon instead. Each monomer must be difunctional for a chain rather than a single small molecule to result.
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About Polymers
Polymers are large molecules made from repeating monomer units joined by covalent bonds. The topic distinguishes addition polymers such as polyethylene, PVC and polystyrene from condensation polymers such as nylon and polyester, and relates chain structure to thermoplastics, thermosetting polymers, elastomers, properties, uses and environmental concerns.
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